Opposed to court abandoning agreement (6)

I believe the answer is:

contra

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'opposed to' is the definition.
(thesaurus)

I can't explain the rest of the clue.

(Other definitions for contra that I've seen before include "Against in argument" , "Irregular" , "Rebel fighter" , "US-backed fighter" , "right winger" .)

I've seen this clue in The Irish Times.

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